Fireless cook-stove or cooker.



B. L. BROWN & M. MURPHY.

FIRELESS COOK STOVE on 000mm.

APPLICATION FILED JULY 26, X913 1 1 l O, 1 84.

Patented B. 8, 1914.

4 SH -SHEET 1.

ICI77774477JL 5101 1 77 E. L. BROWN .& M. MURPHY. FIRELESS 000K STOVE 0RCOOKER.

APPLICATION FILED JULY 26. 1913. 1,1 10,184, Patented Sept 8, 1914,

' 4 SHEETS-SHEET 2. ifi

n12 NORRIS PETERS C07. PNor o-urua. wAsnnvc ION. D. C

E. L. BROWN & M. MURPHY.

FIRELESS COOK STOVE OR COOKER.

APPLICATION FILED JULY 26. 1913. 1 1 1 O, 1 34 Patented Sept. 8, 19m

4 SHEETSSHEET 3.

1% W; 0 f e 7 I" k 1i? a Elma/"1:002

Q {C7777V77Q/Z. 51 0140 Wail 02? flzzz/a7x/ E. L. BROWN & M. MURPHY.

FIRBLESS COOK STOVE OR COOKER.

APPLICATION FILED JULY 26, 1913.

1,1 10,184, Patented Sept. 8,1911

4 SKEETSSHEET 4.

amwwtou Z @9014); jflarion 1/1/ 3} .STEATES PATENT QFFI EDMUND L. BRO NAND MORTON MURPHY, OF JANESVILLE, WISCONSIN, ASSIGNORS TO THE CALQBICCOMPANY, OF JANESVILLE, WISCONSIN.

FmnLnsscoox-scrovn OR COOKER."-

To'all'whom-itay concern: ,Be it; known that w e,;EnMU n;L.-Bn0wN Iand,Mon'roN' M RPur, citizens of-the United States-residing at {Janesville, in the county -0f ;;Roek.- andSta-te;of-YVisoonsin, haveinvien,ted -f certain new and g useful lmp ro ments -in;.-F,irelfess;Cook-Stovessor Cookers, of, whichythe following jis a .specification, TIBfQIflBHCQ being .therein to the accom- P -n.i' g. r w g-; 2:: a

ThisiinventiOn reL to automatic cut- :pifs fon firelesscookstoves orcookers and the iikea erein-t m e br e rentm y be tomatically cut.ofLfnord the: cooker assoon as the desired heat oi steam ghasi been ob in "l oth bieetioii lie e on-is th P JQJI QQLQJIE E Qfa; sim le,-;;an c lefiicient cut-off which nay f-Lbe detached; from .the' cooker steam-habee -g n ra d i With-the: 5 93 an ether ob'ects in view bination s,constructionsand .ai gangements ribed and claimed.

. .25"-; of-:, parts, as will be herei riafter fully de- In.thegaccoinpanying drawings Figure is v a perspeotiye ,view of; the,.cooker 1n actual operationu sl ig g s a top plan..v1 ew.

= 1 of the cooker, showing fthe cut-off in position. ig. 3 is avertical-section through the cooker andcut-oif casing showing thecut-ofi mechanism in side elevation. Fig. 4; is aseetion taken online M,of Fig. 3.

. QF-ig. .5. is .an .-enlarged longitudinal section showing the mannerin which the steam or ..heat mayescape afterthe valve has been thrown toan open position and the switch .has been automatically cutroif. Fig. 9is a detail perspective ofv the tripping rod of the cut-off nechanismfor the switch. I

By referring to the drawings it will be i seen, that l designates thecooker proper which is formed of an outer casing 2 having a plastic or'composition bottom plate A,:fil l er,or heat insulating material 4 is ispreferablyuform'edi-of Iporc;e1

i,this;i1iyentionconsists of ce rtain novel com- :placed within the-:cooker'1 andwai? luralit'y of asbestos stone ,or 'othei'e suitable -heating blocks 5 are placed in the-,bott0uf1;:0f-;the cooker and carrycentrally thereof thezheatng coil carrying-block 6 :witb in which blockis wound -a.-plurality,pf1heating coils 7.. :Of course, it should beunderstoodi that the?coils .may be placed inany'desiredsmarinelr;iwithin the block 6.--? A protector platei8 isjczir--ied by one'side of theLQOQkQR-iancEsi'Ss'PIaCed in front of the contactplug fl whichhplilg 111 1101715 other suitable insulating; materia nd'fo'rmsia contact betweenthe-contactu 1. 1 lOEa-nd the contacting .wires; 1.1 which; ;WirBS}l1 and are connected-hi0 tithe: heat;gelifilating block 6. It, of-co\1rse,-s hould' be understood that theheat-insulatinggjn -l ilisformed f ,monc0uduc e;m eria t 1. 1Ajseamless;aluminum iw ell m isjpla d --.W5 i the i lfil fl' i g-iz i-tfielzsfl an ifihj .W is pr v ed:at:th aewt ermfi'zwithm 51tel'locklng' j int; l f9H$uPFQf g-ll fM6l 12- in engagement withg-theanetallie plated; Carried by the 1 99 i aims-0 0k??? iiAftfi 5; bng y ecu e Q: h k nal by means of thehingesandgt I J cover-gar- 'i 'e png ing 'tiorm. up nit under face of thecove'r; glij 1i;,' .,shoulder1.or l d po o 8 siemfi hatpp. 0 the seamless aluminum,-well 12 toconstitute a side seat for the dependingeasingl'l The cover 15 is.providedwith'ga concave socket 19. upon the upper facethereof in whichis placed a metallic basin 2Q;..g tube,- 21 is carried by ,andconnnunica tes with. the 'interior of tlfe s eamless alu- I n'iinum wellbypassing through the. depending casing 117 as is illust ated in' F1gsu3 ,and 4. Theupper end of; the tube 21 pro- ,jects above the lower edgeof the basin 20 in the m anner. asillustratedgingFig. 4, for allowing 'a'valve.,to fit over thejlprojecting end and normally close the passagethrough the tube 21 when theordinarmheatrisre tained within the seamlessaluminum well 12. Itis not necessary to illustrate the valve as placedupon the tube 21, in View of the fact thatvthis valveis foreign to thecon struction or merits of thepresent invention defined by the appendingclaims.

X A circuit breaking casing 22 is detachably mounted upon the cover l5and this casing 22 carries a metallic cup'shape valve seat 23 whichvalve seat :23 is positionedwithin the base 24-; formed of stone,plastic or any othe;- suitable, material. 'lhe...\'al1fe seat 2-3 is pro"titled 'iri'th 11' depending s'teni QFiRY'hich stemfits snugly theupwardly projecting end of the stem for fii inly l olding the circuitbreaking casing upon the cover of the tireless c9911; coolgstoye. Thisal teat is provided ii'i-th a socket portion 26 in which socket portionis lslid'ably placed amen maybe-tamed rubber or any otherthlitablemateriall The val re sea-t2?) is provided ttithan 'a1mrt ure'30 in oneside there 2 0 of a iw'tlt'icl'r aperture 30 communicates witha :efismrlel 31 qforn'ied upon the upperfface of wh b'ase platea'zd 'o'ff the casing 22;" This chatmel ivill allowithe escapement of steam d?heated air iro ni the casing 22 when the QVKMlvQ'F-is'iraised abox e theaperture 30 in seat by means of the steamer lheatedi air 'fwliic'h =ma-y he generated within 'the' seamlessaluminum \1 ell- 'l2.

A bracket 32- is 'rnounted upon the base '34; Ihi's' firipper afirn"3 isprovided ivfth ii -'body* poit7ipti 35 and carries at its s' tormad enda laterally extending finger 36 "lvi'hich fifiger is: adapted'to liimi'tthe swing "tag movement n; the trigger 34 in one di- "iectfidniTl'iebody por'tion' 35of-the trigger j =34 -teminates at 'its' 'r'earend in an abrupt -10 shoulder" which shoulder is adapted to engage-thep'r'ojeeting lipf38 off the bracket 39 carried by tllisjivitch 40. "Thisswitch 4-0 is fpi'v'otally mounted upon the standards 41 which standardsare carried by the base "Q5 fplate 241 i bplu'iality' of contact members"42"zii" e "a'lso 'supported upon the base plate 24 End the switch isadapted to close the cir- 6O Aflat spring 47 is fixe dly secured to thebase plate 24tand passe's underthe' :hr'acket 39 so as to normally'exert 'ain upward pressure upon the switch and force the same to an'ppen position as soon asthe trigger 34 has i '5 been moved'out'o'fengagement with the proasliding valve 27 of a cup shape sti'nctiijrcfwaste of heat and; at the same tifieipret j the ban-ling ofthe mateeookefi jor' -eodkstove [weight of ,the wane- 27,- fofit S ana beinin'ates'in a projecting-foot 53; the foot 53 knob 29. As the steam orheat-5s generated "30 to'a sufficient amount within the well of the'fireless cooker thest'eam wili forceithevalve 27 up'wardly and push"trigger $4 up wardly therebyreleasing thewboulder 37 from the projection38 andthe spniflg fl will thereby forcethe s'witch iipwgtrdly and throwthesa'rne eat 'o'f en agemeutgwetli the, members {L2 thereby 'oiitofi:the flpw{of oil 1"- rent throu h the? heating mile? form 'edfin theheating'bldek 8fiw deed if 1 From the foregoing description it Willberocluced for automatically off the eur- Y r "rent from f electricallyheatedtireless iito plzatej 24 and t'h1s" bracket 32 ccmpnses a w es of='6o1 rse;%sho\fld he understate that it headtdmaaeieatasc 00 may be somanufiactured as'-.-toaofibnimokflate differententinaseaneeisaena"the-desiting of matin eertain 'ttiticls to?ii- 'greafiertemperat'i'ire than bthei sF- by fegHIatinQ the p 'hndeistddd thatthe-time ati vhich the valve win' opea vWillIDereatlycbfitrolledfbyjthe' weight of the'iial e itself and by increasingand decreasing t'lifvvi'ght'of tli eVaNe 27'it w ill 'be obvious thatthe ljat jto be'-"generated within the coolcstove n'iay be'idjustedtofachemmed-ate the difiiiit teiii'piatiitcs diesircd. It should be'fiiit'hr'boriie'iili mind that the invention ma belnofgiified its detailmechanical fconstriiction 'without"de- '11s parting "from'thes'piiifio'fthe inyentidn. 1

Frdm the foregoing description itjwlll *be seen that apositi've andautomatic circuit breaker has been produced for ,use in nection withfireless cooke't's ivher'eby the current will be automatically cut-'oflat the proper time, for it is necessary that a cut- 05 be so constructedconnection-With firel-ZYSS cookers that tliesamemay be only operatedwhen the "temperature *r'ises to a pre-' determined pointfor it is awell 'lrnoyvn fact that the larger thequanti'ty of foods that arecooking the greater length of time is re- As is illustrated in Figs-"1ahdtthe heat ing block 6 is connected in series with the switch 40 byhaving the main conducting wire 54 passing into the casing 22 and beingconnected to the respective posts or contact members 41 and theauxiliary wire 55 is connected to the other posts 42 and then isconnected to the plug 10 for supplying the desired current to theheating block 6.

Having thus described the invention what is claimed as new, is

1. In a fireless cooker or cookstove the combination with a cookingcompartment, a tube projecting therefrom, of a circuit breaking casingprovided with a valve seat having a depending neck fitting over theupper end of said tube, a vertical slidable valve carried within saidvalve seat, said valve seat provided with a transversely extendingdischarge aperture, said casing provided'with a base having a channelformed therein and communicating with said transversely extendingaperture for permitting the discharge of steam from said casing whensaid vertical slidable valve is moved upwardly, aswitch, electricalheating means carried within said compartment, means for supplying anelectric current through said switch to said heating means, and atrigger normally holding said switch in a closed position and adapted torelease said switch as said vertical slidable valve is moved up-'wardly.

2. A circuit breaker comprising a casing provided with a transparentside, a base,

said base provided with a valve seat having a depending neck adapted tofit over a tube, a vertical slidable valve positioned within said valveseat and carrying a resilient knob, said valve seat provided with atransversely extending aperture, said base provided with a transverselyextending channel communicating with said aperture, a switch pivotallymounted within said casing, an operating handle carried by said switchfor facilitating the manual operation thereof, a spring normallyexerting an upward pressure upon said switch and adapted to force thesame to an inoperative position, a trigger pivotally mounted within saidcasing and provided with an abrupt shoulder portion, said switchprovided with a bracket having a projecting end, said projecting endadapted to fit under said abrupt shoulder, a laterally extending fingercarried by said trigger and adapted to limit the swing of said triggerin one direction, a projecting foot carried by said trigger and engagingsaid resilient knob whereby said trigger will he swung upwardly as saidvalve is moved upwardly for automatically releasing said switch at apredetermined point.

In testimony whereof we hereunto afiix our signatures inpresence of twowitnesses.

EDMUND L. BROWVN. MORTON MURPHY. \Vitnesses:

J. R. \IVHIFFEN, H. A. MoEsEn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

